Collective Phonon-Polaritonic Modes in Silicon Carbide Subarrays.
Collective Phonon-Polaritonic Modes in Silicon Carbide Subarrays.
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碳化硅子阵列中的集体声子极化模式。
DOI：
10.1021/acsnano.1c08557
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发表时间：
2021
期刊：
影响因子：
17.1
通讯作者：
J. Caldwell
中科院分区：
文献类型：
--
作者：
Guanyu Lu;C. Gubbin;J. Nolen;T. Folland;K. Diaz;I. Kravchenko;J. Spencer;M. Tadjer;O. Glembocki;S. De Liberato;J. Caldwell
局域表面声子极化激元 (LSPhP) 可以通过纳米级图案设计来设计光与物质的相互作用，适用于一系列中红外应用空间。然而，迄今为止研究的极性材料系统主要集中在周期性晶胞中具有单个元素的简单设计。增加晶胞的复杂性可以用来修改谐振近场和晶胞内和晶胞间的耦合，以及决定远场的光谱调谐。在这项工作中，我们利用更复杂的晶胞结构来实现具有额外设计自由度的 LSPhP 模式，这在很大程度上尚未被探索。这些子阵列设计支持具有明显对称和反对称近场的集体激发 LSPhP 模式，这些子阵列设计基于纳米柱，纳米柱根据子阵列元素的数量进行缩放，以确保单位单元尺寸恒定。此外，我们在我们制造的子阵列中观察到集体对称模式的异常模式匹配，该模式匹配对于子阵列内柱的数量变化以及以缺失柱的形式故意引入的缺陷具有鲁棒性。因此，这项工作说明了针对各种红外应用（例如表面增强光谱和生化传感）同时定制的 LSPhP 共振和模态近场轮廓的分层设计。
Localized surface phonon polaritons (LSPhPs) can be implemented to engineer light-matter interactions through nanoscale patterning for a range of midinfrared application spaces. However, the polar material systems studied to date have mainly focused on simple designs featuring a single element in the periodic unit cell. Increasing the complexity of the unit cell can serve to modify the resonant near-fields and intra- and inter-unit-cell coupling as well as to dictate spectral tuning in the far-field. In this work, we exploit more complicated unit-cell structures to realize LSPhP modes with additional degrees of design freedom, which are largely unexplored. Collectively excited LSPhP modes with distinctly symmetric and antisymmetric near-fields are supported in these subarray designs, which are based on nanopillars that are scaled by the number of subarray elements to ensure a constant unit-cell size. Moreover, we observe an anomalous mode-matching of the collective symmetric mode in our fabricated subarrays that is robust to changing numbers of pillars within the subarrays as well as to defects intentionally introduced in the form of missing pillars. This work therefore illustrates the hierarchical design of tailored LSPhP resonances and modal near-field profiles simultaneously for a variety of IR applications such as surface-enhanced spectroscopies and biochemical sensing.
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影响因子：
16.6
作者：
Gubbin, Christopher R.;Berte, Rodrigo;De Liberato, Simone
通讯作者：
De Liberato, Simone
通过ε-近零纳米腔实现超强等离子体-声子耦合
影响因子：
35
作者：
Yoo, Daehan;de León-Pérez, Fernando;Pelton, Matthew;Lee, In-Ho;Mohr, Daniel A.;Raschke, Markus B.;Caldwell, Joshua D.;Martín-Moreno, Luis;Oh, Sang-Hyun
通讯作者：
Oh, Sang-Hyun
影响因子：
7
作者：
Chen, Yiguo;Francescato, Yan;Maier, Stefan A.
通讯作者：
Maier, Stefan A.
影响因子：
7
作者：
Berte, Rodrigo;Gubbin, Christopher R.;Caldwell, Joshua D.
通讯作者：
Caldwell, Joshua D.
影响因子：
3.2
作者：
Folland, T. G.;Nordin, L.;Caldwell, J. D.
通讯作者：
Caldwell, J. D.